Hongfa vacuum interrupter chamber in all kinds of vacuum circuit breakers, vacuum contactors and vacuum load switches and other types of vacuum switch core components, with high insulation level, low interception value, strong interrupting ability, long life, small size and other advantages, simple maintenance, no explosion risk, no pollution, low noise. The products are widely used, in addition to being used in rural power grids and urban power grids, they are also applicable to the power distribution systems of machinery, mines, chemical industry, metallurgy, cement, railway, communication and industrial high-frequency heating.